<div class="row {$class}" {$attr|raw}>
    {volist name="$cols" id="col"}
    <div class="col-md-{$col->getSize()} {$col->getClass()}" {$col->getAttrWithStyle()|raw}>
      {volist name="col->getElms()" id="elm"}
        {:$elm->render()}
      {/volist}
    </div>
    {/volist}
</div>